Question about 2006 Nissan Xterra
Fuel economy is currently just over 10 mpg! Car starts and runs well. As you go through the gears it runs perfect until about 2000 rpms then hesitates and then surges when you get to 2800 rpms and again runs fine until you shift to the next gear. Check engine and ABS come on sporatically but no codes (maybe the Nox sensor). New nox sensor came with the used car but not installed. Is a $600 labor job and mechanic doesn't think it will affect performance. Fuel pump? Fuel filter? Fuel sensor? Spark plugs are pretty darn new. Mechanic wants to spend $150 searching for the problem. Would like to try something ourselves first.
this problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.
Posted on Oct 22, 2008
my truck didn't do the crazy idling so much but it was running a little rough before it finnally died. it just wouldn't start back up. i changed the fuel filter i could hear the fuel pump working i finnally pulled a spark plug out and realized it wasn't getting spark. after hooking a computer module up under the dash it told me that the camshaft position sensor was out. the sensor is integrated into the distributor therefore you have to change the distributor to replace the sensor. hope this helps some, i'm actually trying to fix mine tomarrow
Posted on Dec 04, 2008
This is most likely one of your cam shaft sensors. The reason your transmission goes to 5th gear and stays there is because the car automatically goes into "safe mode". This prevents you from running the car on high RPM's which decreases the chance of causing more damage to the engine.
Depending on the code you get from the check engine light, it will be one of the cam-shaft sensors or the crank shaft sensor. A code reader will answer that question.
Often the sensor just fails or oil gets into the connectors which prevents proper reading. This sometimes goes away temporarily when engine is hot but problem will return.
To replace the cam shaft sensors you are looking at approximately 30 min of work. Its a tight fit but not a difficult job.
Cam shaft sensors are about $80. Not sure how much crank haft sensor is.
Hope this helps, and good luck.
Posted on Dec 16, 2009
O2 sensors, EGR or catalytic converter(s) may be malfunctioning.
If you've ever had a blown head gasket the coolant coming through could have clogged the O2 sensor and the cat.
EGR system could be out, do you hear any exhaust coming from the EGR pipe or EGR? also try and push in the EGR diaphragm, being careful not to damage the rubber
Also there are a few products you can buy at auto parts stores that claim to fix high nox, but I have not had success with these myself.
Posted on Jan 05, 2010
Testimonial: "Thank you very much for that info."
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